geometry
A magician has a conical hat that has a height of 1 m and a radius of 0.3 m. The hat does not fit his head. In order for the hat to fit perfectly, the radius needs to be 0.5 m. The magician can change the size of the hat with a spell, but the spell only changes the height of ...July 7, 2011

geometry
A soccer ball has diameter of 400 mm. A pin is stuck into the ball such that it creates the chord AC, which is 20 mm. What is the distance from the chord formed by the pin, and what is the length of EB? (Hint: CD=radius)June 30, 2011